CN1095107C

CN1095107C - Mobile navigation system

Info

Publication number: CN1095107C
Application number: CN95102579A
Authority: CN
Inventors: 矢野文子; 後藤博文
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1995-01-20
Filing date: 1995-09-29
Publication date: 2002-11-27
Anticipated expiration: 2015-09-29
Also published as: KR100197053B1; JP3781795B2; KR960030061A; CN1127396A; DE19527786C2; JPH08201086A; US5936631A; DE19527786A1

Abstract

In a mobile navigation system of the present invention, a route between two desired points can be easily recognized on any scale. The mobile navigation system includes a CD-ROM for storing map data therein, an operation panel on which a user performs operations, a vehicle position detecting unit for detecting a vehicle position, a CRT display for displaying a map image thereon together with route marks and a vehicle position mark, and a navigation controller for searching the most suitable guidance route from a departure spot to a destination. When a detailed map and a wide-area map are used, routes are respectively displayed by different methods by displaying large route marks in the detailed map and displaying small route marks in the wide-area map.

Description

Mobile navigation system

The present invention relates to a kind of mobile navigation system, be used for displayed map, and on the map that is shown, show each bar course line.

Figure 31 is that a routine Japanese Unexamined Patent Publication No is the block diagram of disclosed common mobile navigation system in the document of 60-108709.The operating means of course line memory storage, display and keyboard that among this figure,

label

21,22,23,24,25 and 26 represents the signal processing apparatus of range sensor, heading sensor, CPU and so on respectively, be made up of a storer in the multiple storer and so on.

The operation of mobile navigation system is described below.Adopt operating means 26, the user is set to the current location of a certain vehicle on the map in the signal processing apparatus 23 when setting out, and the vehicle course on the map is set at an appropriate position.Travelled after each vehicle sets out behind a certain preset distance (hereinafter being called distance X), position data is stored in the respective stored table that is configured in the course line memory storage 24.1 to 50000,1 to 100000,1 to 200000 and 1 to 400000 these four map displaying ratios are as the displaying ratio of the map that shows on the display 25.The storage list corresponding with displaying ratio is configured in the course line memory storage 24.Signal processing apparatus 23 is according to the data of range sensor 21 and heading sensor 22 outputs, and positional data is calculated in case of necessity.Vehicle has travelled after the distance of 2X, 4X, 8X and 16X each time, and the position data of calculating is stored in the storage list with 1 to 50000,1 to 100000,1 to 200000 and 1 to 400000 displaying ratio respectively.

What Figure 32 described is the structure of storage list.Label 31 expression is the storage list of 1 to 50000 position data corresponding to displaying

ratio.Label

32,33 and 34 represents that respectively displaying ratio is the storage list of 1 to 100000,1 to 200000 and 1 to 400000 position data.

Signal processing apparatus 23 reads the corresponding position data of map scale that shows with display 25 from storage list 31 to 34, and the position data that reads is offered display 25.For example, when with 1 to 200000 ratio displayed map, along with vehicle along the travelling of certain track, display 25 is 8X at a certain distance, shows the data that read from storage list 33.When with 1 to 100000 ratio displayed map, along with vehicle along the travelling of certain track, display is 4X at a certain distance, shows the data that it reads from storage list 32.And when with 1 to 50000 ratio displayed map, along with vehicle along the travelling of certain track, that display shows is that it reads from storage list 31, be set in the data on each segment distance 2X.Therefore, both made when map shows with any displaying ratio, also can on display screen, equally spaced show the driving trace of vehicle.

Above-described is conventional portable navigational system.In addition, also calculated the distance that vehicle travels, every corresponding to the distance display of each map scale the track that travels of vehicle.Yet this method also can be applied to vehicle and be actuated to the situation that the back shows track.But, adopt a certain course line iff suggestion, but in fact vehicle does not navigate by water, then the method for this routine just should not adopt.

So at the problems referred to above, one object of the present invention is to provide a kind of mobile navigation system, this mobile navigation system can be in the interval corresponding to each map scale, shows the navigation mark on the course line that vehicle also do not travel easily.

To achieve these goals, comprise the map datum memory storage, be used for storing each map datum corresponding with a plurality of ratios according to the mobile navigation system of an inventive point of the present invention; The course line memory storage is used for storing the data in the relevant course line between desired 2; And map display, be used for data and course data according to the map and show course line on a map and the map.Map display is according to the ratio of each map, the demonstration of switching route singly.

According to another inventive point of the present invention, this mobile navigation system comprises the map datum memory storage, is used for storing with first ratio and greater than the relevant map datum of second ratio of first ratio; The course line memory storage is used for storing between desired 2 the data in relevant course line; And map display, be used for demonstrating first map, according to going out second map with the second ratio corresponding map data presentation according to map datum corresponding to first ratio; And, show the course line mark on first or second map according to course data.Map display is arranged to the course line mark that shows on first map less than the course line mark that shows on second map.

According to the another inventive point of the present invention, this mobile navigation system comprises the map datum memory storage, is used for storing and first ratio and the relevant map datum of second ratio that is different from first ratio; The course line memory storage is used for storing between desired 2 the data in relevant course line; And map display, be used for according to and the first ratio corresponding map data presentation, first map, according to the second ratio corresponding map data presentation, second map, and show course line mark on first or second map according to course data.It is different with the course line mark that shows on second map that map display is marked in shape the course line that shows on first map.

According to another inventive point of the present invention, this mobile navigation system comprises the map datum memory storage, is used for storing the map datum that comprises line and node; The course line memory storage is used for storing the course data between desired 2; And display device is used for according to the map that data presentation goes out map, and according to course data, shows the course line mark on the respective gut, and each line has certain length range on map.

According to the another inventive point of the present invention, this mobile navigation system comprises: the map datum memory storage is used for storing and comprises with first ratio and be different from the relevant line of second ratio of first ratio and the map datum of node; The course line memory storage is used for storing the course data between desired 2; And map display, be used for according to and the first ratio corresponding map data presentation, first map, according to the second ratio corresponding map data presentation, second map, and according to course data, show the course line mark on the corresponding predetermined line that extends on first or second map.Between the predetermined line on second map, the line that exists a course line mark not to be shown at least.

According to another inventive point of the present invention, this mobile navigation system also disposes the course line calculation element that course data is calculated.

Fig. 1 is the block scheme of first kind of embodiment of the present invention;

What Fig. 2 described is applied each node of first kind of embodiment of the present invention address stored respectively;

What Fig. 3 described is to show the detail map that is used for first kind of embodiment on screen;

What Fig. 4 described is to show employed wide area map among first kind of embodiment on screen;

Fig. 5 is a process flow diagram of carrying out the navigation seek operations among first kind of embodiment;

Fig. 6 is the process flow diagram of the map display operation carried out among first kind of embodiment;

What Fig. 7 described is applied typical course line mark among the present invention;

Fig. 8 describes is the relation between applied node and the line among the present invention;

What Fig. 9 described is to show the detail map of using among second kind of embodiment of the present invention on display screen;

What Figure 10 described is to show the wide area map of using among second kind of embodiment on display screen;

Figure 11 is a process flow diagram of describing the map display operation of carrying out among second kind of embodiment;

What Figure 12 described is the insertion point of using among the present invention;

What Figure 13 described is to show the wide area map of using among the third embodiment of the present invention on display screen;

Figure 14 describes is the process flow diagram of the map display operation carried out among the third embodiment of the present invention;

Figure 15 describes is the process flow diagram of the map display operation carried out among the 4th kind of embodiment of the present invention;

Figure 16 is the typical line data plot of using among the 4th kind of embodiment of the present invention;

What Figure 17 described is to show the wide area map of using among the 5th kind of embodiment of the present invention on display screen;

Figure 18 describes is the process flow diagram of the map display operation carried out among the 5th kind of embodiment;

What Figure 19 described is the map display operation of carrying out among the 6th kind of embodiment of the present invention;

What Figure 20 described is the typical line data of using among the 6th kind of embodiment;

What Figure 21 described is the display screen of using among the present invention;

What Figure 22 described is to show the detail map of using among the 7th kind of embodiment of the present invention on display screen;

What Figure 23 described is to show the wide area map of using among the 7th kind of embodiment on display screen;

Figure 24 is the process flow diagram of the map display operation carried out among the 7th kind of embodiment;

Figure 25 is the process flow diagram of the map display operation carried out among the 8th kind of embodiment of the present invention;

What Figure 26 described is to show the detail map of using among the 9th kind of embodiment of the present invention on display screen;

What Figure 27 described is to show the wide area map of using among the 9th kind of embodiment on display screen;

Figure 28 is a process flow diagram of describing the map display operation of carrying out among the 9th kind of embodiment;

What Figure 29 described is the display screen of using among the present invention;

It is the another kind of display screen of using among the present invention that Figure 30 describes;

Figure 31 is the block scheme of conventional mobile navigation system;

What Figure 32 described is the layout of conventional track storage list.

With reference to the accompanying drawings, describe preferred embodiment of the present invention in detail.[first kind of embodiment]

Fig. 1 is the mobile navigation system block scheme according to first kind of embodiment of the present invention.What Fig. 2 described is to store each address of node respectively.What Fig. 3 described is the display screen that shows a detail map.What Fig. 4 described is the top display screen that shows wide area map.Fig. 5 is a process flow diagram of describing the navigation seek operations.Fig. 6 describes the operational flowchart that a certain map that comprises the course line mark is shown.

Among Fig. 1, label 1 expression stores map datum as the CD-ROM of map datum memory storage in this map datum memory storage.Operation panel of label 2 expression, it comprises respectively can be along left, to the right, the cursor key, navigate mode setting key, starting point setting key, destination setting key, the map that move of direction recovers shift key, ratio shift key, initiate key etc. up and down.Therefore, the user can be by the cursor mark on the map that the operation cursor key moves arbitrarily or translation shows.Vehicle location detecting unit with direction sensor and range sensor of label 3 expressions is used for by two sensors, detects and is driven the position of vehicle, and therefrom export vehicle location data and vehicle course data.CRT monitor of label 4 expression as map display, this display can show a map according to incoming video signal on its display screen, and on display screen, show the current location mark, course line mark etc. navigates.In addition, can on CRT monitor 4, change the color that is used for showing road according to the character (as fast traffic lane, national highway, local road etc.) of road.

Label 10 representatives are searched by the course line, determine or judge the navigation controller in best navigation course line between starting point and the destination.In addition, navigation controller 10 produces the map image data of relevant vehicle current location periphery, and with the data that produce together with current vehicle location mark, navigation course line mark, output to CRT monitor 4.

Label 11 in the navigation controller 10 is memory buffer, is used for the map datum that temporary transient storage reads from CD-ROM1.Label 12 is represented 1 cursor position computing unit, when recover shift key by the cursor key on the operation panel 2, map, when the map scale shift key carries out map selection operation or cursor operations, this cursor position computing unit calculates on display screen longitude and the latitude corresponding to cursor position (being generally the center of displayed map), and therefrom export result of calculation, as the cursor position data.

Label 13 expressions one mapping controller, it will recover the pairing map datum of ratio that shift key, map scale shift key etc. are selected with the map in the operation panel, before the vehicle starting or driving, be read in the memory buffer 11 from CD-ROM1, and on V-RAM18, draw a map image.When vehicle moved, according to the vehicle location data of vehicle location detecting unit 3 inputs and the needs of vehicle course data variation, mapping controller 13 was read into new map datum in the memory buffer 11 from CD-ROM1.Subsequently, the map image that mapping controller 13 upgrades among the V-RAM18, thereby make current vehicle location place screen center usually, the center of map image shows vehicle location mark like the arrow in V-RAM18, and the arrow of vehicle location mark is placed on the direction in vehicle course line that the vehicle course data determines or course.

Label 14 expressions one starting point/destination storage or setup unit.When dividing into when deciding starting point and destination in the operation of operation panel 2 before vehicle sets out, starting point/destination storage unit 14 storage starting point and destination longitude and latitudes is as starting point position data and destination data.Label 15 expressions are searched the unit as the navigation course line of course line calculation element.When setting starting point and destination by operation panel 2, the navigation course line is searched unit 15 and is read the starting point position data of relevant starting point and the destination locations data of relevant destination from starting point/destination storage unit 14.In addition, unit 15 is searched from CD-ROM in the navigation course line, the search starting point is raked out diagram data to required course line, the course line of destination be read in the memory buffer 11.In addition, unit 15 is searched by with reference to the map datum that reads in the navigation course line, also, considers viaduct condition, traffic jam situations etc. on according to the map and the path of the bee-line of expression, search one from starting point to the destination optimum guidance path.Constitute a series of nodes (each node contains the longitude and latitude coordinate) of having searched guidance path and be stored in the navigation course line storer 16, with starting point data and destination data conduct navigation course data.

Label 16 expressions are used for storing the navigation course data as the navigation course line storer of course line memory storage.As shown in Figure 2, from 16 the cube (16 of F000 to FFFF ³) individual address as address setting in navigation course line storer 16.The navigation course line is searched a series of nodes of determining in the unit 15 and is stored in the place, address in the following sequence.The starting point data storage is at address F000 place.A series of nodes are stored in address F001 to FFFE successively and locate, promptly, that node on the navigation course line after the starting point is stored in F001 place, address, that node behind this node is stored in F002 place, address, destination data is stored in rearmost that place, address) promptly, if having 16 for a sequence node ³Individual address then is address FFFF).

Suppose that a sequence node is set to N000 to NFFF, N000 represents starting point data so, and NFFF represents destination data, and N001 to NFFE represents the position data of locating between starting point data and the destination data midway.

Label 17 expressions one navigation course line rendering controller, when vehicle in motion, navigation course line rendering controller 17 receives according to the navigation course line current data of storage in the storer 16 of navigation course line and draws or hook is drawn in the navigation course data that exists in the map image scope among the V-RAM18, and, draw the navigation course line according to the method for drafting of map image ratio correspondence among the V-RAM18.

Label 18 is represented V-RAM, and its is stored the map image of mapping controller 13 draftings and is superimposed upon the navigation course line that drafting forms on the map image by navigation course line rendering controller 17, and output is as view data.Label 19 expressions one video converter is used for converting the view data of V-RAM18 output to vision signal, and the signal of conversion is outputed to CRT monitor 4.

CRT monitor 4 can with 1 to 12500,1 to 25000,1 to 50000,1 to 100000,1 to 400000,1 to 1600000 and 1 to 6400000 totally 7 kinds of ratios come displayed map.When the map that shows with these scale, the scale down that is presented on the CRT monitor 4 with map is followed successively by 100m, 250m, 500m, 1Km, 4Km, 15Km and 60Km.The engineer's scale of a wide about 1cm of any one proportional representation that dwindles.

Below, will be called " detail map " according to first map of 1 to 12500 to 1 to 100000 scale, and will be called " wide area map " according to each map of 1 to 400000 to 1 to 6400000 scale.

Below the simple operation of describing first kind of embodiment.At first, user's operating operation plate 2 is to set starting point and destination.Secondly, the navigation course line is searched unit 15 and is carried out the course line search, to search or to seek the path of advising between starting point and the destination.Subsequently, on the map that shows, show the course line mark.When the map that shows is detail map, show with big course line mark as shown in Figure 3.On the other hand, when the map that shows is wide area map, show with little course line mark as shown in Figure 4.This display packing can realize by making the navigation course line following two kinds of data of rendering controller 17 storages, promptly, be used for detail map about the data of big course line mark and be used for the data that having of wide area map turns down the course line mark, and appropriately use these data in the ratio of map.

Fig. 5 and 6 is respectively a process flow diagram of describing navigation controller 10 operations.The operation of present embodiment is described below in conjunction with Fig. 5 and 6.

At first describing the navigation course line with reference to Fig. 5 searches.When the map on user's push plate 2 recovers shift key, map scale shift key etc. and shows that with the ratio of a certain requirement institute is required regional map, mapping controller 13 is read into desired map datum in the memory buffer 11 from CD-ROM1, and indication V-RAM18 draws a map image.Video converter 19 converts the relevant data of the map image drawn among the V-RAM18 to vision signal subsequently, and the result that will change outputs to CRT monitor 4.CRT monitor 4 bases are input to the vision signal at this place, and demonstration one map on display (S101, S201).

Then, when pressing operation panel 2 and set the routine navigation mode, cursor medially is presented on the map of demonstration.When the cursor key of pressing operation panel 2 changes or during translation cursor mark, cursor position coordinate Calculation device 12 calculates the data (coordinate of longitude and latitude) (S103 to S106) of relevant cursor mark translation position.Variation in response to the cursor position of having calculated by cursor position coordinate Calculation unit 12, mapping controller 13 draw map images in V-RAM18, make that the cursor mark is positioned at the middle position of display screen all the time when being read into the map datum in the preset range in the memory buffer 11 from CD-ROM1.In addition, mapping controller 13 is plotted in the cursor mark centre of map image among the V-RAM18.As a result, the map on the screen according to cursor operations by on be rolled to a kind of like this state, make the cursor mark be in middle position, be displayed on the screen (S107, S108).That is, cursor is marked on the display screen and moves, and according to the operational ton of cursor key, move or translation be map.

The user operates cursor key, thereby makes cursor mark on the display screen arrive certain a bit or an impact point.When the cursor mark arrived impact point, the user just suspended cursor operations.Subsequently, the destination setting key on user's push plate 2.When pressing the destination setting key, starting point/destination setting unit 14 deposit cursor position computing unit 12 output the cursor position data (S109, S110).The user operates cursor once more, translation or moving map on display screen.When the cursor mark arrived starting point, the user just suspended his/her cursor operations.When the starting point setting key on user's push plate 2, the cursor position data of cursor position computing unit 12 output are deposited in starting point/destination setting unit 14, as the starting point data (S111, S112).

Therefore, finish deposit starting point data and destination data in starting point/destination setting unit 14 after (when answer is "yes" at the S113 place), unit 15 is searched according to starting point data and destination data in the navigation course line, vehicle is moved to the necessary map datum in destination from starting point be read in the memory buffer 11 from CD-ROM1.Simultaneously, the navigation course line is searched unit 15 and is searched the best navigation course line with bee-line, for example as an index, make navigation course line storer 16 storages one sequence node, these nodes form the navigation course line (S114) of search with first starting point data and last destination data.Each node data of storage comprises longitude and latitude coordinate in the storer 16 of navigation course line.

If constituting the node data (comprising starting point data and destination data) in navigation course line at this moment is 16 ³, so, as shown in Figure 2, the course data that will navigate is stored in the navigation course line storer 16.

The symbol data of relevant course line mark is described below.The suggestion of drawing on the navigation course line rendering controller 17 storage maps is as the symbol data of the relevant course line mark in course line.As shown in Figure 7, the course line mark of storage is triangular in shape, and respectively along 32 courses, the direction of representative navigation.In the present embodiment, two kinds of course datas have been stored: as the data of the big course line of detail map mark with as the data of the little course line mark of wide area map.The shape of each course line mark slightly changes by its direction, thereby the user can observe the figure with the representative of limited point easily.

Be described in the method that shows the course line mark on the display screen below with reference to Fig. 6.When the initiate key on user's push plate 2, mapping controller 13 receives the delivery position data from vehicle location detecting unit 3.In addition, mapping controller 13 is read into the map datum of relevant vehicle location coordinate periphery in the memory buffer 11 from CD-ROM1, and according to the vehicle location data, draw map images in V-RAM18, thereby with current vehicle location place display screen the center (S115, S116).

Subsequently, the map of navigation course line rendering controller 17 pairs of demonstrations belongs to detail map or wide area map decision making (S117).According to result of determination, set a map scale option code A.If the map that shows is a detail map, then A is set to 0 (A=0), draws the detail map with big course line mark in V-RAM18, and the travel direction of direction sensing destination or vehicle (S118, S119).If displayed map is wide area map, then A is set to 1 (A=1), draws the wide area map with little course line mark in V-RAM18, and direction sensing destination (S120, S121).

Navigational course rendering controller 17 is according to the map of 1 to 12500 to 1 to 6,400,000 seven kind of scale, the map of the scale with 1 to 12500 to 1 to 100000 is judged to be detail map, and the map of 1 to 400000 to 1 to 6400000 scale is judged to be wide area map.In addition, navigation course line rendering controller 17 is according to the size of address stored in the storer 16 of navigation course line, according to each two the adjacent node that forms the adjacent arranged nodes in a navigation course line (starting point and destination place is interpreted as node in the present embodiment), judge or definite node near the destination.Subsequently, triangle course line mark can be drawn by the some place of navigation course line rendering controller 17 in the middle of the line that is formed by each two node, thereby points to the node near the destination.At this moment,, just adopt the big course line mark of detail map,, just adopt the little course line mark of wide area map if the map that shows is wide area map if the map that shows is a detail map.

If forming the node number in navigation course line is 16 ³, the line number is exactly 16 between the node so ³-1.If node and line are represented with N000 to NFFF and L000 to LFFF respectively, so just obtain enroute chart as shown in Figure 8.

Some place in the middle of each line respectively has a direction to point to the triangle course line mark P of destination.If each line has a course line mark, so adjacent course line mark just looks like approaching mutually with the expansion of map.Yet in fact this phenomenon can't appear.With regard to map datum, if the map scale that shows has nothing in common with each other, the node number is different with the line number so.That is, it is node that the medium and small intersection point of detail map also is considered as, and in wide area map, can skip these little intersection points to a certain extent, and only big intersection point is considered as node.So each map datum is configured to, when the length of each line is tending towards getting wide area map along with displayed map between the adjacent node and increase.So if under the situation of the map of drawing under any ratio, each line shows a course line mark, the interval between the mark of so adjacent course line is comparatively suitable, thereby the user can set a display screen that is easy to watch.

Subsequently, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and as shown in Figure 3, the map center of drawing in V-RAM18 is drawn the vehicle location mark (S122) that extends along the direction of representing the vehicle course data.

Video converter 19 becomes a certain predetermined video signal with the image transitions of drawing among the V-RAM18, and exports CRT monitor 4 to.CRT monitor 4 with map image together with course line mark and place the vehicle location mark of display screen centre to be presented on the display screen.Point out that in passing big course line mark is presented on the detail map shown in Figure 3, and little course line mark is presented on the wide territory map shown in Figure 4.

When vehicle began to travel, vehicle location detecting unit 3 just detected vehicle location and vehicle course, and exports the data about vehicle location and course to mapping controller 13 after each vehicle has travelled a preset distance.In addition, vehicle location detecting unit 3 also outputs to the vehicle location data navigation course line rendering controller 17.When vehicle location data and vehicle course data when vehicle location detecting unit 3 is input to mapping controller 13, mapping controller 13 is read into memory buffer 11 with the map datum of the periphery of relevant vehicle location from CD-ROM1, and in V-RAM18, draw a map image, thereby the center of display screen overlap with vehicle location (S123, S124).

Subsequently, navigation course line rendering controller 17 is judged the value (S125) of sign indicating number A.If A=0, what promptly show is a detail map, and the course line rendering controller 17 that navigates so reads from navigation course line storer 16 and is included in the V-RAM18 mapping district and is positioned at node around the vehicle location.In addition, the course line mark of each detail map is drawn at a certain centre position place of navigation course line rendering controller 17 between adjacent node, thereby as shown in Figure 3, makes each course line mark be superimposed upon (S126) on the map image of drawing among the V-RAM18.If A ≠ 0, if i.e. demonstration is a wide territory map, the course line rendering controller 17 that navigates so reads from navigation course line storer 16 and is included in the node around the vehicle location in the V-RAM18 mapping district.In addition, the course line mark of each wide territory map is drawn at a certain centre position place of navigation course line rendering controller 17 between adjacent node, thereby each course line mark is superimposed upon on the map image of drawing among the V-RAM18.

Then, mapping controller 13 is according to the vehicle course data, and the vehicle location mark (S128) that extends along expression vehicle course data direction is drawn in the center of map making in V-RAM18.At this moment, map image is rolled to a kind of like this state on the display screen on a preset distance, makes the vehicle location mark be fixed on the center of display screen.When changing ratio by the engineer's scale shift key on the operation panel 2 (S129), conventional program is got back to S116, and map making again resets a yard A subsequently, draws the course line mark again and draws the vehicle location mark again.

Each vehicle has travelled after the preset distance or map scale when changing, and repeats to draw map image, course line mark and the vehicle location mark at vehicle location periphery place in above-mentioned same mode, thereby display screen is upgraded.[second kind of embodiment]

Second kind of embodiment is described below.What Fig. 9 described is the situation that shows the detail map of using among second kind of embodiment on display screen.The situation that on display screen, shows wide territory map that Figure 10 describes.Figure 11 is the process flow diagram of map display operation.Except navigation course line rendering controller adopted with first kind of embodiment in the different ad hoc structure, structurally the mobile navigation system with first kind of embodiment is identical for the mobile navigation system among second kind of embodiment.

Below the simple operation of describing second kind of embodiment.The user presses an operation panel 2, sets a starting point and a destination.Navigational system is carried out the course line search, to search the course line of advising between starting point and the destination.Subsequently, when displayed map show be the width of cloth detail map time, as shown in Figure 9, show a course line mark on each line.On the other hand, when show be a fabric width territory map time, as shown in figure 10, on other lines, show a course line mark.For example, as shown in figure 10, skip line a, on line b, show the course line mark.

Figure 11 is the basic operation process flow diagram of navigation controller 10.The operation of present embodiment is described below with reference to Figure 11 and Fig. 5.Adopt and first kind of similar method of embodiment, at first set starting point and destination, and search the navigation course line.When the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3, and from CD-ROM1 the data of the map of relevant vehicle location periphery is read in the memory buffer 11.Subsequently, mapping controller 13 is drawn a map image on V-RAM18, thus make the center of display screen overlap with the current location of vehicle (S215, S216).

Subsequently, navigation course line rendering controller 17 judges or judges that the map that shows is detail map or wide territory map (S217).According to first kind of embodiment in identical mode, navigation course line rendering controller 17 is provided with a map scale option code A according to result of determination.If what show is detail map, then A is set to 0 (A=0).In addition, in V-RAM18, at each the line intermediate point place that constitutes the suggestion course line, draws a direction sensing destination the course line mark (S218, S219).If what show is wide territory map, then A is set to 1 (A=1).In addition, at each second line intermediate point place of each line that forms the suggestion course line, draw towards a course line mark of destination (S220, S221).

Secondly, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws the vehicle location mark (S222) that extends along the direction of expression vehicle course data.At this moment, determined the map indication range in advance, thereby the center of map is overlapped with the current location of vehicle.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RAM18, and exports it to CRT monitor 4.As a result, CRT monitor 4 shows the map image of relevant vehicle periphery, and course line mark and the vehicle location mark that is positioned at the display screen centre.When the map that shows was a detail map, as shown in Figure 9, each line showed a course line mark.On the other hand, when the map that shows is wide territory map, as shown in figure 10, on other lines, show the course line mark.

When vehicle began to start, vehicle location detecting unit 3 detected the position and the course of vehicle after each vehicle has travelled a preset distance, and exports the data about vehicle location and course to mapping controller 13.In addition, vehicle location detecting unit 3 exports the vehicle location data to navigational course rendering controller 17.When vehicle location data and vehicle course data when vehicle location detecting unit 3 is input to mapping controller 13, mapping controller 13 is read into the map datum of relevant vehicle location periphery in the memory buffer 11 from CD-ROM1.In addition, mapping controller 13 is drawn a map image in V-RAM18, make the display screen center overlap with vehicle location (S223, S224).

Then, navigation course line drawing controller 17 is judged the value (S225) of sign indicating number A.If A=0, the node around that course line rendering controller 17 comprises from navigation course line storer 16 reads the mapping district of V-RAM18, the vehicle location of then navigating.And then navigation course line rendering controller 17 draws each course line mark at the intermediate point place of each circuit, makes each course line mark be superimposed upon (S226) on the map image of drawing among the V-RAM18.If A ≠ 0, the node around that course line rendering controller 17 comprises from navigation course line storer 16 reads the mapping district of V-RAM18, the vehicle location of navigating so.And then navigation course line rendering controller 17 draws each course line mark at the intermediate point place of each second line, thereby makes each course line mark be superimposed upon (S227) on the map image of drawing among the V-RAM18.Subsequently, the map center that mapping controller 13 is drawn in V-RAM18 is drawn one along the vehicle location mark (S228) of representing vehicle course direction to extend.

At this moment, roll a preset distance on the map image on the display screen, make vehicle location remain on the central authorities of display screen.When the map scale shift key on user's operating operation plate 2 changes engineer's scale (S229), S216 is got back in program run, carries out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number A thereupon.

Each vehicle has travelled after the preset distance or when changing map scale, has repeated to draw map image, course line mark and the vehicle location mark at vehicle location periphery place in above-mentioned same mode, thus the update displayed screen.

When showing detail map, if single line is oversize, so that in the time of can't on the display screen of CRT monitor 4, showing the course line mark, the course line rendering controller 17 that then navigates can show two course line marks, makes it corresponding with a intermediate point between the node on the outer course line mark display position (corresponding to the intermediate point of each line) of display screen and this mark display position both sides, course line.On the other hand, when showing wide territory map, if contiguous two lines are oversize, in the time of consequently can't showing the course line mark on the display screen of CRT monitor 4, the course line rendering controller 17 that navigates so can show the course line mark on the line that is not shown the course line mark at the beginning.

In the present embodiment, when showing wide territory map, show that the course line mark on each second line is not to be with any condition.Yet later that circuit that occurs at once is the course line that does not show the course line mark above if the user forwards intersection point to, and the user is seeing the display screen of CRT monitor 4 so, can be difficult to understand turn to which intersection point.Like this, when this intersection point was passed through in the navigation course line, on the line that intersection point occurs later at once on the navigation course line among the V-RAM18, navigation course line rendering controller 17 can unconditionally be drawn a course line mark.In addition, navigation course line rendering controller 17 judges that also the navigation course line by intersection point is to extend along road, still departs from outside the road (for example, making intersection point turn to the right side, or turning to the left side).If judging the navigation course line is not along road direction, the course line mark may be plotted on the line that occurs at once behind the intersection point on the navigation course line among the V-RAM18.

In the present embodiment, show a course line mark on each line.Yet, also can show two or more course lines mark on the line.

Article one, line is made up of two nodes.But, as shown in figure 12, between an ordinary node and a node, can have some insertion points of representing a certain road curve.So a course line mark can be respectively drawn at one section intermediate point place between one section intermediate point between node and the insertion point and each insertion point.When show be wide territory map the time, the course line mark can be plotted on each bar second line section.[the third embodiment]

The third embodiment of the present invention is described below.What Figure 13 described is to show the wide territory map of using among the third embodiment on a display screen.Figure 14 is the process flow diagram of map display operation.Except the ad hoc structure of using among navigation course line rendering controller and the first kind of embodiment was different, the navigational system of the third embodiment structurally navigational system with first kind of embodiment was identical.

Below the simple operation of describing the third embodiment.User's operating operation plate 2 is set starting point and destination.Navigational system is carried out the course line search, searches the course line of advising between starting point and the destination.When desiring displayed map and be detail map, then with second kind of embodiment in similar mode, show a course line mark of first line as shown in Figure 9.In addition, when the map that shows is wide territory map, then as shown in figure 13, on display screen, only draw the course line mark on each has the line of length-specific, these are different with situation among second kind of embodiment.

The method of judging each wire length on display screen is, calculates the distance of line, determines apparent length according to calculated distance and map scale, and the line that will be shorter in length than predetermined length is set at short line.Do not draw the course line mark on the short line, the course line mark only is plotted on the long line.

The operation of present embodiment is described below in conjunction with Figure 14 and Fig. 5.Similar to first kind of embodiment, at first set starting point and destination, and search a bar navigation course line.Then, with the information stores in the navigation course line of relevant search in a navigation course line storer 16 (seeing the S101 to S114 among Fig. 5).Subsequently, when the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3, and from CD-ROM1 the map datum around the relevant vehicle location coordinate is read in the memory buffer 11.Then, mapping controller 13 is drawn a map image on V-RAM18, thus make the center of display screen overlap with the current location of vehicle (S315, S316).

Subsequently, the map of 17 pairs of demonstrations of navigation course line rendering controller is that detail map or wide territory map judge (S317).Navigation course line rendering controller 17 is according to judged result setting map ratio size A.If the map that shows is a detail map, the course line rendering controller 17 that navigates so is set at 0 (A=0) with map scale option code A, and on V-RAM18, constitute the intermediate point place of each line in suggestion course line, paint the course line mark that a direction points to the destination (S318, S319).If the map that shows is a wide territory map, the course line rendering controller 17 that then navigates is set at 1 (A=1) with map scale option code A, and calculates the distance or the length of each line that constitutes the suggestion course line.Calculate the outward appearance length of first line on the display screen according to the map scale of calculated distance and demonstration.Apparent length more than or equal to each the line intermediate point place of the L among the V-RAM18 draw the course line mark that a direction points to the destination (S320, S321).

Specifically, the coordinate of supposing to constitute the node N1 of line and N2 be (X1, Y1) and (X2, Y2), the course line rendering controller 17 that navigates so calculates the physical length L of line according to following formula:

L＝((X1-X2) ²+(Y1-Y2) ²) ^1/2

For example, if map scale is l/400000, so, can obtain the apparent length M by following formula:

So M=L/400000, only note Shanghai Airways, Ltd. wire tag on the given line of M 〉=L.

Subsequently, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and along the direction of representing the vehicle course data, a vehicle location mark (S322) is painted by the map central authorities of drawing in V-RAM18.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RAM, and it is outputed to a CRT monitor 4.As a result, CRT monitor 4 shows the map image of relevant vehicle location in the above together with the course line mark, makes vehicle location be positioned at the center.When show be detail map the time, annotating a course line mark on each line as shown in Figure 9.On the other hand, when show be wide territory map the time, the course line mark by note to the line of length M more than or equal to the L shown in Figure 13.For example, the course line mark is plotted on the line corresponding to a long line, is not draw the course line mark on corresponding to the line c of short line and d.

When vehicle began to travel, after vehicle had travelled a preset distance, vehicle location detecting unit 3 detected vehicle location and vehicle course at every turn.Vehicle location detecting unit 3 outputs to mapping controller 13 with the data about vehicle location and course line.Subsequently, vehicle location detecting unit 3 outputs to navigation course line rendering controller 17 with the vehicle location data.When vehicle location data and vehicle course data when vehicle location detecting unit 3 is input to mapping controller 13, mapping controller 13 is read into the map datum of relevant vehicle periphery in the buffer register 11 from CD-ROM1.Subsequently, mapping controller 13 is drawn a map image in V-RAM18, make the display screen center overlap with vehicle location (S323, S324).

Subsequently, navigation course line rendering controller 17 is judged the value (S325) of sign indicating number A.If A=0, then navigate course line rendering controller 17 from navigation course line storer 16 read comprise in the V-RAM18 mapping district, be positioned at node around the vehicle location as data.Subsequently, navigation course line rendering controller 17 is drawn each course line mark at the intermediate point place of each line, thereby makes each course line mark be superimposed upon (S326) on the map image of drawing among the V-RAM18.If A ≠ 0, the course line rendering controller 17 that then navigates calculates the distance of each line, and determines the apparent length M of each line on display screen according to the map scale of calculated distance and demonstration.Enclose a course line mark (as the line e among Figure 13) in length more than or equal to each line intermediate point place of L, on the line of length M be less than L not note course line mark (as line c and the d among Figure 13) (S327).

Then, mapping controller 13 along the map center on the direction of expression vehicle course data, is drawn a vehicle location mark (S328) according to the vehicle course data in V-RAM18.At this moment, roll a preset distance on the map image on the display screen, make vehicle location appear at the center of map.When the map scale shift key on user's operating operation plate 2 changed engineer's scale (S329), customary process was got back to S316, carried out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number A subsequently again.

After vehicle has travelled preset distance or after map scale changes, repeat to draw map image, course line mark and the vehicle location mark at vehicle location periphery place with above-mentioned same method at every turn.

When the map that shows is wide territory map, on the short line of apparent length, be not enclose the course line mark.Yet, when the user turn over when not having the course line mark on the line that intersection point occurs later on immediately (when because the user turn over line that intersection point occurs later on immediately short and when not showing the course line mark), the user is difficult to understand must turn over which intersection point on the display screen of CRT monitor 4.So, when the navigation course line when the intersection point, navigation course line rendering controller 17 judges that the navigation course line by intersection point is to extend or depart from road direction (for example, make intersection point turn to the right side or turn to the left side) along road.When the judgement of making is navigation course line during along road direction, then turns on the line that the intersection point among the V-RAM18 occurs later on immediately and draw a course line mark the user.

When the navigation course line when the intersection point, then on the line that occurs immediately behind the passage that passes through in the navigation course line, no matter the apparent length of this line how, all can be drawn a course line mark.[the 4th kind of embodiment]

The 4th kind of embodiment of the present invention is described below.Figure 15 is the map display operation of carrying out among the 4th kind of embodiment.The line data that Figure 16 describes.Except navigation course line rendering controller on ad hoc structure with first kind of embodiment in adopt different, structurally the structure with first kind of embodiment is identical for the navigational system among the 4th kind of embodiment.

Below the simple operation of describing the 4th kind of embodiment.User's operating operation plate 2 is set starting point and destination.Navigational system is carried out the course line and is searched suggestion course line of search between starting point and destination.If the map that shows when displayed map is a detail map, then adopt with similar method among second kind of embodiment, on each respective gut, adopt a course line mark, that is, as shown in Figure 9, show a course line mark on each line.On the other hand, when the map that shows is a wide territory map, similar method among employing and the third embodiment, on each respective gut, adopt a course line mark, promptly, as shown in Figure 13, note course line mark not on the short line, a mark note in course line has on each bar line of length-specific.

In the present embodiment, all enclose the course line mark on the line data of all CD-ROM1 and judge sign indicating number n, corresponding with each engineer's scale.Three of the line data effective code n1, n2 and n3 are corresponding with the course line mark judgement yard n of the map of 1 to 6400000,1 to 1600000 and 1 to 400000 engineer's scale drafting with expression respectively.The course line mark is judged the data that the relevant short line that is shorter in length than L is given in sign indicating number " 0 " tax.The course line mark judges that sign indicating number " 1 " tax is to the data of length more than or equal to the relevant line of L.When each code value is " 0 ", do not show the course line mark.When code value is " 1 ", just show the course line mark.

Below with reference to Figure 15 and Fig. 5, operation of the present invention is described.At first, similar to the situation among first kind of embodiment, starting point and destination are set.Subsequently, with the information stores in the navigation course line of relevant search in the storer 16 of navigation course line (Fig. 5 S101 to S114).When the initiate key on operator's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3.Then, mapping controller 13 is read into the map datum around the relevant vehicle location coordinate in the memory buffer 11 from CD-ROM1.In addition, mapping controller 13 is drawn a map image on V-RAM18, make the center of display screen overlap with the current location of vehicle (S415 among Figure 15, S416).

Then, the map of navigation course line rendering controller 17 pairs of demonstrations is detail map or wide territory map decision making (S417).Navigation course line rendering controller 17 is set a map scale option code A according to result of determination.When show be detail map the time, navigation course line rendering controller 17 is set at 0 (A=0) with map scale option code A.Subsequently, and the course line mark of direction sensing of each line intermediate point place drafting destination in the course line of navigation course line rendering controller 17 formation suggestions in V-RAM18 (S418, S419).When show be wide territory map the time, navigation course line rendering controller 17 is set at 1 (A=1) with map scale option code A, and the course line mark that reads the line that constitutes the suggestion course line is judged a sign indicating number n.Judge that for the course line mark sign indicating number n is the intermediate point of each line of " 1 ", set the course line mark that a direction is pointed to the destination.When the course line mark judges that sign indicating number is not " 1 " (being n=0), be course line mark note is not gone to this line (S420, S421).

Secondly, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws a vehicle location mark along the direction of expression vehicle course data.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RM18, and it is outputed to a CRT monitor 4.As a result, together with course line mark and the vehicle location mark that places the display screen center, CRT monitor 4 shows the map image of a relevant vehicle location on display.When show be detail map the time, as shown in Figure 9, on each line, draw a course line mark.On the other hand, when show be wide territory map the time, as shown in figure 13, course line mark on note on the line of each n=1.

When vehicle began to start, after vehicle had travelled a preset distance, vehicle location detecting unit 3 detected a vehicle location and a vehicle course at every turn.Vehicle location detecting unit 3 outputs to mapping controller 13 with the data about vehicle location and course.Subsequently, vehicle location detecting unit 3 outputs to navigation course line rendering controller 17 with the vehicle location data.

When vehicle location data and vehicle course data when vehicle location detecting unit 3 is imported into mapping controller 13, mapping controller 13 is input to memory buffer 11 from CD-ROM with the map datum of relevant vehicle location periphery.Subsequently, mapping controller 13 is drawn a map image in V-RAM18, make the center of display screen overlap with vehicle location (S423, S424).Then, navigation course line rendering controller 17 is judged the value (S425) of sign indicating number A.If A=0, then navigate course line rendering controller 17 from navigation course line storer 16 read comprise the V-RAM18 mapping district, be positioned at the node around the vehicle location, as data.Subsequently, navigation course line rendering controller 17 is drawn each course line mark at the intermediate point place of each line, makes each course line mark be superimposed upon (S426) on the map image of drawing among the V-RAM18.

If A ≠ 0, the course line rendering controller 17 that then navigates are read the course line mark of each line and formulated a sign indicating number n, and show a course line mark (S427) at an intermediate point place of the line of n=1.Subsequently, the mapping controller is according to the vehicle course data, and the vehicle location mark is drawn according to vehicle data (S428) by the map center place of drawing in V-RAM18, the direction that its direction indication vehicle course data is extended.At this moment, roll a preset distance on the map image on the display screen, make vehicle location be fixed on the center of map.When the map scale shift key on user's operating operation utmost point 2 changed engineer's scale (S429), customary process turned back to S416, carried out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number A subsequently again.

When vehicle has travelled preset distance or map scale change, adopt above-mentioned identical mode at every turn, repeat to draw map image, course line mark and the vehicle location mark of vehicle location periphery.

In third and fourth kind of embodiment, course line mark of note on each line.Yet, also can two or more course line marks of note on each line.

For instance, a line is formed by two nodes.Yet, as shown in figure 12, between a normal node and a node, have some to represent the insertion point of path curve.When show be detail map the time, can show the course line mark singly, and need not course line mark note to corresponding line at the intermediate point place between the intermediate point between node and the insertion point and each insertion point.When show be wide territory map the time, the course line mark can be presented on the line segment between node and the insertion point respectively or on the line segment between each insertion point, here, the length of line segment is more than or equal to a predetermined length.

In the third and the 4th kind of embodiment, when show be wide territory map the time, be note course line mark not on the line of apparent length less than L.Yet, can change with reference to length L for each map scale.With reference to wire length is to be provided with like this, and L1 is corresponding to the map of drawing with 1 to 6400000 engineer's scale, and L2 is corresponding to the map with 1 to 1600000 engineer's scale drafting, and L3 is corresponding to the map with 1 to 400000 engineer's scale drafting ...Like this, the course line mark can note to the line of length greater than the reference wire length, be note course line mark not on the line that is shorter in length than with reference to wire length.

In addition, can change each with reference to wire length according to user's wish or other demonstration on the map.

Among the 4th kind of embodiment, if a line is oversize when showing detail map, so that can't on the display screen of CRT monitor 4, show the course line mark, the course line rendering controller 17 that navigates so can show two course line marks altogether, thereby corresponding with a display screen course line mark display position (corresponding to the intermediate point of each line) and an intermediate point between this course line mark display position two mid-side nodes outward.On the other hand, if do not have when showing wide territory map to go up note course line mark at short line (line of course line flag code n=0) one by one on the display screen of CRT monitor 4, the course line rendering controller 17 that then navigates can show the course line mark on the line that does not have note course line mark at the beginning.

Among the 4th kind of embodiment, a course line mark is arranged on each bar line.But, two or more course line marks also can be arranged on the line.

In the 4th kind of embodiment, the line mark is to be presented at singly on the intermediate point of line section between the intermediate point of one section line between a node and the insertion point and each the adjacent insertion point, cannot not be additional the course line mark on respective gut.In addition, corresponding with a plurality of line segments that constitute each line course line mark judges that sign indicating number n is respectively stored among the CD-ROM1.When show be wide territory map the time, the course line mark can be affixed on the line segment of n=1 in a plurality of line segments.

Among the 4th kind of embodiment, when the map that shows is wide territory map, be to append to without the course line mark to represent the line of n (the course line mark is judged sign indicating number)=0 to get on.Yet, when not having the course line mark on the line that has occurred at once after the user has made intersection point turn (the line mark of that line that has occurred immediately after the user has made intersection point turn to is judged when sign indicating number n is 0 (n=0)), it is to be difficult to understand the user should turn to which intersection point that the user watches the display screen of CRT monitor 4.So, when intersection point is passed through in the navigation course line, can unconditionally show the course line mark.Then, navigation 17 pairs of navigation course lines by intersection point of rendering controller, course line are along the road extension or depart from road (that is, making intersection point turn to right side or left side) and decision making.When being judged as navigational course is during along road direction, has both made the course line mark judge that a sign indicating number n is at 0 o'clock, also draws the course line mark in V-RAM18.[the 5th kind of embodiment]

The 5th kind of embodiment of the present invention is described below.What Figure 17 described is a display screen.What Figure 18 described is the process flow diagram of map display operation.Except having the different ad hoc structures of being adopted among navigation course line rendering controller and the first kind of embodiment, the 5th kind of embodiment is structurally identical with first kind of embodiment.

Below the simple operation of describing the 5th kind of embodiment.User's operating operation plate 2 is set starting point and destination.Navigational system is carried out the course line and is searched the course line of a suggestion of search between starting point and destination.During displayed map, as shown in figure 17, do not have the course line mark on the short line, the course line mark only is attached to each bar to have on the line of length-specific.In the present embodiment, above-mentioned course line mark additional treatments is carried out with all proportions chi, is not add differentiation to detail map and wide territory map.For example, calculate actual line distance or length, and calculate the apparent length of each line according to the map scale of each computed range and demonstration.Only show that length is more than or equal to the course line mark on the line of a certain predetermined length.

The operation of present embodiment is described below with reference to Figure 18 and Fig. 5.Similar with first kind of embodiment, at first set starting point and destination, search a navigation course line.Subsequently, with the information stores in the navigation course line of relevant search in the storer 16 of navigation course line (S101 to S114 among Fig. 5).Then, when the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3, and the map datum around the relevant vehicle location coordinate is read in the memory buffer 11 from CD-ROM1.Then, mapping controller 13 is drawn a map image on-V-RAM18, make the center of display screen overlap with the current location of vehicle (S515 among Figure 18, S516).

Subsequently, navigation course line rendering controller 17 calculates distance or the length that constitutes each line of suggestion course line, and according to the map scale of calculated distance and demonstration, judges the apparent length of line on the display screen.Then, navigation course line rendering controller 17 in V-RAM18 length more than or equal to drawing a direction on the intermediate point of each line of L towards the course line of destination mark (S517).

More particularly, the coordinate of supposing to constitute the node N1 of each line and N2 be (X1, Y1) and (X2, Y2), the course line controller 17 that then navigates calculates the length L of line according to following formula:

L＝((X1-X2) ²+(Y1-Y2) ²) ^1/2

So, if map scale represents that with S apparent wire length M can be obtained by following formula so:

M＝L×S

For example, if map scale is 1 to 400000, the apparent length M can be obtained by following formula so:

M＝L×(1/400000)

Now, navigation course line rendering controller 17 only shows the course line mark on the line of given M 〉=L.

Subsequently, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and along the direction of representing the vehicle course data, the map center of drawing in V-RAM18 is drawn a vehicle location mark (S518).

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RAM18, and exports it to a CRT monitor 4.As a result, together with the course line mark, CRT monitor 4 is presented at the map image of relevant vehicle location on the display, makes vehicle location be in middle position.According to above-mentioned processing mode, as shown in figure 17, one by one the course line mark is appended on the line of apparent length M more than or equal to L.

Now, as vehicle begin to travel (S519), when perhaps the map scale shift key on user's operating operation plate 2 changed map scale (S520), mapping controller 13 was read into the map datum of relevant vehicle location periphery in the memory buffer 11 from CD-ROM1.Then, mapping controller 13 is drawn a map image in V-RAM18, makes map center overlap (S516) with vehicle location.

Subsequently, navigation course line rendering controller 17 reads the vehicle location node on every side that comprises the mapping district of V-RAM18 from navigation course line storer 16, as data.Then, navigation course line rendering controller 17 calculates the distance or the length of each line, and according to the length of calculating and the map scale of demonstration, determines the apparent line length on the display screen.And navigation course line rendering controller 17 is added to the course line mark on the map image of V-RAM18, makes it to be attached to the mid point (S517) of apparent length M more than or equal to the line of L.Subsequently, mapping controller 13 is according to the vehicle course data, and draw along the vehicle location mark (S518) of representing vehicle course data direction to extend the center of the map of drawing in V-RAM18.

After vehicle has travelled preset distance or map scale change, adopt mode same as described above at every turn, repeat to draw map image, course line mark and the vehicle location mark at vehicle location periphery place.

On the display screen of CRT monitor 4, in the time of on the course line mark not being appended to one by one the short line of apparent length, navigation course line rendering controller 17 can append to the course line mark on the line of not enclosing the course line mark at the beginning.At this moment, navigation course line rendering controller 17 can be attached to the course line mark on each second short line among the V-RAM18.

A course line mark can be arranged on each line, two or more course line marks also can be arranged on each line.

For instance, a line is made up of two nodes.Yet, as shown in figure 12, between a normal node and node, can exist some to represent the insertion point of road curve.The course line mark can be presented at one by one between node and the insertion point intermediate point and on the intermediate point between each insertion point that does not have affix course line mark on the respective gut.Subsequently, the course line mark can be presented at respectively on the line section and the line section between the insertion point between node and the insertion point, and the apparent length of line section is more than or equal to a predetermined length.

In addition, there is not the course line mark on the line of apparent length less than L.Yet, can change with reference to length L according to each map scale.With reference to line length is to set like this, L1 is corresponding to the map with 1 to 6400000 scale, L2 is corresponding to the map with 1 to 1600000 scale, L3 is corresponding to the map of 1 to 400000 scale, L4 is corresponding to the map of 1 to 100000 scale, and L5 is corresponding to the map with 1 to 50000 scale, and L6 is corresponding to 1 to 25000 map of drawing, L7 is corresponding to 1 to 12500 map of drawing ...Therefore, be shorter in length than and cannot be additional the course line mark on the line with reference to wire length.In addition, according to cartographic information and the quantitative increase of map scale or reduce and to change each with reference to length.

The course line mark is not append to the short line of apparent length to get on.Yet, if do not have the course line mark on the line that intersection point occurs later on immediately when the user turns over (when since the user turn over that line that intersection point occurs later on immediately short and when not showing the course line mark), the user is difficult to understanding should turn to for which intersection point on the display screen of CRT monitor 4.So when intersection point was passed through in the navigation course line, navigation 17 pairs of navigation course lines by intersection point of rendering controller, course line were along the road extension or depart from road (for example, making intersection point turn to right side or left side) and decision making.When the result who judges is that the navigation course line is not to extend along road, then both made line shorter, also can turn over additional course line mark on the later line that occurs immediately of intersection point the user.In addition, when intersection point is passed through in the navigation course line, no matter the length of each apparent line how, all can enclosed a course line mark on that line that occurs immediately behind the intersection point.[the 6th kind of embodiment]

The 6th kind of embodiment of the present invention is described below.Figure 19 is that the map of carrying out among the 6th kind of embodiment shows the process flow diagram that moves.What Figure 20 described is the line data.

Except navigation course line rendering controller have with first kind of embodiment in the different ad hoc structure that adopted, the navigational system among the 6th kind of embodiment is identical with the structure of first kind of embodiment.

Below the simple operation of describing the 6th kind of embodiment.User's operating operation plate 2 is provided with starting point and destination.Navigational system is carried out the course line and is searched the course line of a suggestion of search between starting point and destination.During displayed map, adopt with the 5th kind of embodiment in similar methods, the course line mark does not append to short line and gets on, the course line mark only is attached on the line that each bar has length-specific.Above-mentioned course line mark additional process is to carry out under the situation of the detail map of map making under the proportional chi in district office not and the difference between the map of wide territory.

In the present embodiment, the course line mark judges that sign indicating number n is attached on the line data of storing among the CD-ROM1.As shown in figure 20, each course line mark judges that the length of sign indicating number is a byte length.N1 to n7 sign indicating number is judged yard with the course line mark of 1 to 6400000 to 1 to 12500 engineer's scale map making corresponding to expression.The course line mark judges that " 0 appends on length each relevant line data of line less than L sign indicating number.The course line mark judges that sign indicating number " 1 " is set on length each relevant line data of line more than or equal to L.If the course line mark is judged sign indicating number n=0, then do not show the course line mark.On the other hand, when the course line mark is judged sign indicating number n=1, just show the course line mark.

Figure 19 is the basic operation process flow diagram of navigation controller 10.The operation of present embodiment is described below with reference to Figure 19 and Fig. 5.Adopt and first kind of embodiment similar methods, at first set starting point and destination, search the navigation course line.The information stores in the navigation course line of relevant search is in the storer 16 of navigation course line (S101 to S114 among Fig. 5).Then, behind the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3.Subsequently, mapping controller 13 is read into the map datum around the relevant vehicle location coordinate in one memory buffer 11 from CD-ROM1.In addition, mapping controller 13 is drawn a map image on V-RAM18, make the center of display screen overlap with the current location of vehicle (S615 among Figure 19, S616).

Then, navigation course line rendering controller 17 reads the course line mark that constitutes each line of suggestion course line and judges sign indicating number n, and the course line mark (S617) that a direction is pointed to the destination is drawn at the intermediate point place of each n=1 line in V-RAM18.

Subsequently, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws the vehicle location mark (S618) that extends along expression vehicle course data direction.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RAM18, and exports it to a CRT monitor 4.As a result, CRT monitor 4 shows map image, the course line mark of relevant vehicle and the vehicle location mark that is positioned at the map centre.For example, the image of demonstration as shown in figure 17.

When on the display screen of CRT monitor 4, one by one the course line mark is not attached to short line (being the line that the course line mark is judged sign indicating number n=0) when going up, on navigation course line rendering controller 17 another in V-RAM18, at drafting course line mark on the short line of note course line mark at the beginning.

Now, when vehicle begins starting, when perhaps the map scale shift key on user's operating operation plate 2 changes map scale (S620), mapping controller 13 is read into the map datum of relevant vehicle location periphery in the memory buffer 11 from CD-ROM1.Then, mapping controller 13 is drawn a map image in V-RAM18, makes vehicle location overlap (S616) with map center.The course line rendering controller 17 that navigates subsequently reads node that comprise in the V-RAM18 mapping district, around the vehicle location from navigation course line storer 16, as data.Subsequently, the course line mark that navigation course line rendering controller 17 reads each line is judged sign indicating number, and shows a course line mark (S617) at each line intermediate point place of n=1.After vehicle has travelled a preset distance or map scale change, adopt method same as described above at every turn, repeat to draw vehicle location map image, course line mark and vehicle location mark on every side.

In the present embodiment, course line mark of affix on each line.Yet, can two or more course line marks of affix on the line.

For example, a line is made of two nodes.Yet, as shown in figure 12, between a normal node and a normal node, can have the insertion point that is used for representing a road curve.The course line mark is presented on the intermediate point of that section line section between node and the insertion point and on the intermediate point of not enclosing one section line section between each adjacent insertion point of course line mark on the respective gut singly.In addition, corresponding with constituting a plurality of line sections of each line course line mark judges that sign indicating number n is respectively stored in the CD-ROM1.Therefore, the course line mark can be attached on each the bar line section of n=1 in a plurality of line sections.

Among the 6th kind of embodiment, there is not the course line mark on the line of expression n (the course line mark is judged sign indicating number)=0.Yet, do not have course line mark (promptly the course line mark of the line that occurs immediately judges that sign indicating number is 0 (n=0)) on the line of appearance after the user turns over intersection point immediately later on if turn over intersection point the user, the user is seeing that the display screen of CRT monitor 4 is difficult to understanding and should turns to which intersection point so.So when intersection point was passed through in the navigation course line, navigation course line rendering controller 17 can unconditionally be drawn the course line mark in V-RAM18.Then, navigation 17 pairs of navigation course lines by intersection point of renderer, course line are to extend or departing from road (for example, make intersection point turn to the right side or turn to the left side) judges along road.When judging that the navigation course line is during along road direction, can draw pavement marker in V-RAM18.

In the 3rd to the 6th kind of embodiment, when show be detail map the time, if one line is oversize, so that in the time of can't on the display screen of CRT monitor 4, showing the course line mark, navigation course line rendering controller 17 can be drawn two course line marks, and is corresponding with the intermediate point between the node on course line mark display position (corresponding to the intermediate point of each line) beyond the display screen and this mark display position both sides, course line.

Among first to the 6th kind of embodiment, the shape of each navigation mark note can be a triangle with direction.Yet the course line mark also nonessentially has a direction.Also can adopt the circular course mark as shown in Figure 21.[the 7th kind of embodiment]

The 7th kind of embodiment of the present invention is described below.What Figure 22 described is the display screen that shows a detail map.What Figure 23 described is the display screen that shows a wide territory map.Figure 24 is the process flow diagram of display screen display operation.Except different with the ad hoc structure that adopts among first kind of embodiment, the structure of the 7th kind of embodiment is identical with first kind of embodiment.

Below the simple operation of describing the 7th kind of embodiment.One user operates an operation panel 2 and sets starting point and destination.Navigational system enters the course line and searches, and searches a suggestion course line between starting point and destination.What show when displayed map is detail map, and then as shown in figure 22, display direction points to the triangular route mark of destination.When show be wide territory map the time, as shown in figure 23, show the circular course mark that does not have direction.

Among first kind of embodiment, what detail map showed is big course line mark, and what wide territory map showed is little course line mark.At this moment, no matter be detail map or wide territory map, demonstration be mutual identical triangle course line mark.Yet in the present embodiment, the shape of the course line mark in detail map and the wide territory map is mutually mutually different.

Horizontal and vertical the counting of upward arranging of the display screen of the standard C RT display of installing on the vehicle 4 represented with 328 * 242.Therefore, among first kind of embodiment, 32 courses are just represented as shown in Figure 7 with the orientation of course line mark.Yet the many more and size each course line mark that the number in course increases reduces manyly more, and the generation of each course line mark image is just difficult more.This has produced difficulty with regard to making the discriminating between the mark of course line.

So in the present embodiment, what detail map showed is big triangle course line mark, and what show during the map of wide territory is the roundlet course line mark of counting and reducing.As a result, can easily produce the shape of each course line mark, and the sharpness of each course line mark on the display screen 4 is improved.

The operation of present embodiment is described below with reference to Figure 24 and 5.Adopt with first kind of embodiment in similar methods, at first set starting point and destination, and search the navigation course line.The navigation course line of relevant search is stored in the storer 16 of navigation course line (S101 to S114 among Fig. 5).When the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3.Subsequently, mapping controller 13 is read into the map datum around the relevant vehicle location coordinate in the memory buffer 11 from CD-ROM1.Subsequently, mapping controller 13 is drawn a map image on V-RAM18, and map center is overlapped with the vehicle current location (among Figure 24 8715, S716).

Subsequently, navigation course line rendering controller 17 judges that the map that shows is detail map or wide territory map (S717).Navigation course line rendering controller 17 is set a map scale option code according to judged result.If what show is detail map, then A is set to 0 (A=0).Then, navigation course line rendering controller 17 constitutes the intermediate point place of each line of suggestion course line in V-RAM18, draws the triangle course line mark of a direction sensing destination, make triangle course line mark be presented on the display screen (S718, S719).If what show is wide territory map, then A is set to 1 (A=1).Then, a circular course mark is drawn at the intermediate point place that constitutes each line in suggestion course line in V-RAM18, thus demonstration circular course mark (S720, S721).

Mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws a vehicle location mark (S722) along the direction of expression vehicle course data.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing in the V-RAM18, and exports it to CRT monitor 4.CRT monitor 4 shows map image, the course line mark of relevant vehicle periphery and the vehicle location mark that places the display screen centre.

When vehicle began to travel, after vehicle had travelled a preset distance at every turn, vehicle location detecting unit 3 detected vehicle location and vehicle courses.Subsequently, vehicle location detecting unit 3 outputs to mapping controller 13 with the data about vehicle location and course, also the vehicle location data is exported to navigation course line rendering controller 17 simultaneously.When vehicle location data and vehicle course data when vehicle location detecting unit 3 is input to mapping controller 13, mapping controller 13 is read into the map datum of relevant vehicle location periphery in the memory buffer 11 from CD-ROM1.Then, mapping controller 13 is drawn a map image in V-RAM18, make the center of map overlap with vehicle location (S723, S724).Subsequently, navigation course line rendering controller 17 is judged the value (S725) of sign indicating number A.If A=0, the course line rendering controller 17 that then navigates reads node that comprise the V-RAM18 mapping district, around the vehicle location from navigation course line storer 16, as data.Then, navigation course line rendering controller 17 is drawn each triangle course line mark at the intermediate point place of each line, make each triangle course line mark be superimposed upon (S726) on the map image of drawing among the V-RAM18.If A ≠ 0, the course line rendering controller 17 that then navigates shows circular course mark (8727) one by one at the intermediate point place of each line.

Then, mapping controller 13 is according to the vehicle course data, and draw along the vehicle location mark (S728) of representing vehicle course direction to extend at the map center place of drawing in V-RAM18.At this moment, roll a preset distance on the map image on the display screen, make vehicle location remain on the center of display screen.When the map scale shift key on user's operating operation plate 2 changes engineer's scale (S729), customary process is got back to S716, carries out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number A subsequently again.

Travelled after preset distance and map scale change by the user at vehicle at every turn, repeated to draw map image, course line mark and the vehicle location mark at vehicle location periphery place in above-mentioned same mode.[the 8th kind of embodiment]

The 8th kind of embodiment of the present invention is described below.Figure 25 is the process flow diagram of map display operation.Except the ad hoc structure that adopts with first kind of embodiment was different, the navigational system among the 8th kind of embodiment was structurally identical with first kind of embodiment.

Below the simple operation of describing the 8th kind of embodiment.User's operating operation plate 2 is set starting point and destination.Navigational system is carried out the course line and is searched suggestion course line of search between starting point and destination.During displayed map,, show the course line mark that size and shape have nothing in common with each other according to map scale.Promptly, for the sharpness that makes the course line mark in the mode similar to previous embodiment on the display screen of CRT monitor 4 improves, map according to the engineer's scale of seven kinds of grades in 1 to 12500 to 1 to 6400000 is drawn shows (promptly being divided into seven kinds of different grades) course line mark that size and shape has nothing in common with each other.

The data of the relevant course line mark of navigation course line rendering controller 17 each engineer's scale of storage, and, use these data rightly according to the engineer's scale of map to be shown.

Course line mark corresponding to each map scale is as described below;

The map that engineer's scale with 1 to 12500 is drawn

Course line mark A

Represent the course line mark with 32 kinds of directions or course.

The map that engineer's scale with 1 to 25000 is drawn

Course line mark B

Represent the course line mark with 32 kinds of courses, each course line mark is slightly less than boat

Wire tag A.

The map that engineer's scale with 1 to 50000 is drawn

Course line mark C

Represent the course line mark with 16 kinds of courses.

The map that engineer's scale with 1 to 100000 is drawn

Course line mark D

Represent the course line mark with 16 kinds of courses, each course line mark is slightly less than

Course line mark C.

The map that engineer's scale with 1 to 400000 is drawn

Course line mark E

Represent the course line mark with 8 kinds of courses.

The map that engineer's scale with 1 to 1600000 is drawn

The course line flag F

Represent the course line mark with 8 kinds of courses, each course line mark is slightly less than the course line

Mark E.

The map that engineer's scale with 1 to 6400000 is drawn

Course line mark G

Each circular course mark is not represented any direction.

The size of each course line mark reduces to the order of course line mark G gradually by following course line mark A:

Course line mark A＞course line mark B＞course line mark C＞

Course line mark D＞course line mark E＞course line flag F＞

Course line mark G.

Many more as the course number of course line mark, that is,, and reduce the size of each course line mark along multi-direction drafting course line mark, the shape or the structure of then drawing each course line mark are just difficult more.Will make the warpage of each course line mark like this.So the course number or the orientation of minimizing course mark make map to be shown become a wide territory map, and reduce the size of each course line mark.Like this, just can produce the shape of each course line mark easily, improve the clearly gradually degree of each course line mark.

By showing these course line marks, just can on display screen, reduce the size of course line mark, make map become wide territory map.So, when the user projects eyes on the map, can realize the broadening of map, and to judge map to be shown observantly be detail map or wide territory map.

The operation of present embodiment is described below with reference to Figure 25 and Fig. 5.Adopt with first kind of embodiment in similar mode, at first set starting point and destination, and search the course line of navigating.The navigation course line of relevant search is stored in the storer 16 of navigation course line (S101 to S114 among Fig. 5).When the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3.Then, mapping controller 13 is read into the map datum around the coordinate of relevant vehicle location in one memory buffer 11 from CD-ROM1.Subsequently, mapping controller 13 is drawn a map image on V-RAM18, make the display screen center overlap with the current location of vehicle (S815 among Figure 25, S816).

Navigation course line rendering controller 17 is set at the value corresponding with map scale to be shown with map scale option code X.The map corresponding with X=000-110 respectively (S817) that engineer's scale with 1 to 12500 to 1 to 6400000 is drawn.The course line mark corresponding with setting value X is as described below:

X=000: course line mark A

X=001: course line mark B

X=010: course line mark C

X=011: course line mark D

X=100: course line mark E

X=101: course line flag F

X=110: course line mark G

Navigation course line rendering controller 17 is drawn the course line mark (S818) corresponding with setting value X singly at the intermediate point place of each line that constitutes the suggestion course line in V-RAM18.

Mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws the vehicle location mark (S819) that extends along expression vehicle course data direction.

Video converter becomes a predetermined video signal with the image transitions of drawing among the V-RAM18, and exports it to CRT monitor 4.As a result, CRT monitor is with about the map image and the course line mark of vehicle periphery and place the vehicle location mark at displayed map center to show.

When a line oversize, so that in the time of can not on the display screen of CRT monitor 4, showing the course line mark, navigation course line rendering controller 17 can be display screen outside on the node on the position between the initial route mark display position (corresponding to the intermediate point of each line) and these initial route mark display position both sides, two course line marks of drafting in V-RAM18.

When vehicle began to travel, after vehicle had travelled a preset distance, vehicle location detecting unit 3 detected vehicle location and vehicle direction or course at every turn.Subsequently, vehicle location detecting unit 3 exports the data about vehicle location and course to mapping controller 13, and exports the vehicle location data to navigation course line rendering controller 17.When vehicle location data and vehicle course data when vehicle location detecting unit 3 is input to mapping controller 13, mapping controller 13 inputs to memory buffer 11 from CD-ROM1 with the map datum of relevant vehicle location periphery, and in V-RAM18, draw a map image, make map center overlap with vehicle location (S820, S821).

Then, navigation course line rendering controller 17 read from navigation course line storer 16 comprise in the mapping district of V-RAM18, be positioned at the node around the vehicle location, as data.Navigation course line rendering controller 17 is judged the value of X, and draws a course line mark corresponding with this X value at the intermediate point place of each line, makes this course line mark be superimposed upon (S822) on the map image of drawing among the V-RAM18.Subsequently, mapping controller 13 is according to the vehicle course data, and a vehicle location mark (S823) that extends along the direction of expression vehicle course data is drawn at the map center place of drawing in V-RAM18.At this moment, roll a preset distance on the map image on the display screen, make vehicle location remain on the center of display screen.

When the map scale shift key on user's operating operation plate 2 changes engineer's scale (S824), customary process is got back to S816, subsequently, carries out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number X again.

Travelled after preset distance or map scale change by the user at vehicle at every turn, be repeated in this description map image, course line mark and the vehicle location mark at vehicle location periphery place with above-mentioned identical method.[the 9th kind of embodiment]

The 9th kind of embodiment of the present invention is described below.Figure 26 describes is the display screen of the demonstration detail map that adopted among the 9th kind of embodiment.Figure 28 is the process flow diagram of map display operation.Except navigation course line rendering controller have with first kind of embodiment in the different ad hoc structure, the navigational system among the 9th kind of embodiment is structurally identical with first kind of embodiment.

Below the simple operation of describing the 9th kind of embodiment.User's operating operation plate 2 is set starting point and destination.Navigational system is carried out the course line and is searched the course line of a suggestion of search between starting point and destination.When displayed map, show be detail map the time, as shown in figure 26, display direction points to the triangle course line mark of destination.When show be wide territory map the time, show the solid line course line as shown in figure 27.

The operation of present embodiment is described below with reference to Figure 28 and Fig. 5.Similar to first kind of embodiment, at first set starting point and destination, and search a navigation course line.Then, with the information stores in the navigation course line of relevant search in the storer 16 of navigation course line (S101 to S114 among Fig. 5).When the initiate key on user's push plate 2, mapping controller 13 receives the vehicle location data from vehicle location detecting unit 3, and from CD-ROM1 the map datum of relevant vehicle location coordinate periphery is read in the memory buffer 11.Then, mapping controller 13 is drawn a map image on V-RAM18, make the center of map overlap with the current location of vehicle (S915 among Figure 28, S916).

Navigation course line rendering controller 17 judges that the map that shows is detail map or wide territory map (S917).Navigation course line rendering controller 17 is set a map scale option code X according to the engineer's scale of displayed map.If what show is detail map, the course line rendering controller 17 that then navigates is set at 0 (A=0) with A, and at each intermediate point place of the line that constitutes the suggestion course line, in V-RAM18, draw singly the triangle course line mark that direction points to the destination (S918, S919).If what show is wide territory map, the course line rendering controller 17 that then navigates is set at 1 (A=1) with A, and by a line among the V-RAM18, drafting one course line on the line that constitutes the suggestion course line (S920, S921).

Subsequently, mapping controller 13 receives the vehicle course data from vehicle location detecting unit 3, and the map center place of drawing in V-RAM18, draws the vehicle location mark (S922) that extends along expression vehicle course data.

Video converter 19 becomes a predetermined video signal with the image transitions of drawing among the V-RAM18, and exports it to a CRT monitor 4.As a result, CRT monitor 4 shows map image, the course line mark of relevant vehicle periphery and is positioned at the vehicle location mark of display screen center.As shown in figure 26, the triangle course line mark of display direction sensing destination in detail map.If wide territory map then shows this course line with solid line as shown in figure 27.

If one line is oversize, so that in the time of can not on the display screen of CRT monitor 4, showing the course line mark, two course line marks are drawn at then the navigate node place on course line rendering controller 17 position and these initial route mark display position both sides between the initial route mark display position outside the display screen in V-RAM18.

When vehicle brought into operation, after vehicle travelled a preset distance, vehicle location detecting unit 3 detected vehicle location and vehicle direction or course at every turn.Subsequently, vehicle location detecting unit 3 exports the data about vehicle location and course to mapping controller 13, and exports the vehicle location data to navigation course line rendering controller 17.When vehicle location data and vehicle course data when the vehicle location detecting unit is input to mapping controller 13, mapping controller 13 is input to the data of relevant vehicle location periphery in the memory buffer 11 from CD-ROM1, and in V-RAM18, draw a map image, make map center overlap with vehicle location (S923, S924).

Subsequently, navigation course line rendering controller 17 is judged the value (S925) of sign indicating number A.If A=0, then navigate that course line rendering controller 17 comprises from navigation course line storer 16 reads the mapping district of V-RAM18, be positioned at the node around the vehicle location, as data.A triangle course line mark is drawn at navigation course line rendering controller 17 each line intermediate point place in V-RAM18, makes triangle course line mark be superimposed upon (S926) on the map image of drawing among the V-RAM18.If A ≠ 0, the line among V-RAM18 of course line rendering controller 17 usefulness of then navigating is drawn a course line, makes this course line be superimposed upon (S927) on each line.Subsequently, mapping controller 13 is according to the vehicle course data, and the map center of drawing in V-RAM18 is drawn one along the vehicle location mark (S928) of representing vehicle course data direction to extend.At this moment, roll a preset distance on the map image on the display screen, make vehicle location remain on the center of display screen.When the map scale shift key on user's operating operation plate 2 changes engineer's scale (S929), customary process is got back to S916, carries out setting, the drafting of course line mark and the drafting of vehicle location mark of drawing Map, sign indicating number A subsequently again.

Each vehicle has travelled after preset distance or map scale change by the user, with above-mentioned identical method, repeats to draw map image, course line mark and the vehicle location mark at vehicle location periphery place.

Although the course line in the map of wide territory shows that by solid line also with dashed lines shows as shown in Figure 29.In addition, also can adopt length alternate line, broken broken line etc.

In according to mobile navigation system of the present invention, as mentioned above, what show when showing detail map is the course line mark, and the course line shows with solid line when showing wide territory map.As a result, can simplify software processes.And under any engineer's scale, can both easily discern the course line.In addition, because two kinds of course line flag datas must be provided, can reduce the necessary capacity of data.

The foregoing description has been described the method that shows the suggestion course line between starting point and the destination.Yet each embodiment also can be used for other course lines and show, as from starting point to certain demonstration by course line between the point etc.In addition, when waiting with half microwave system, inductive radio system or FM multiplex system when showing, also can use the foregoing description from transport information (as traffic jam, construction etc.) that traffic information center etc. sends.

The foregoing description has been described such situation, when a line oversize, so that can't on the display screen of CRT monitor 4, show the course line mark time, always have that two course line marks can be presented at one by one that display screen course line mark display position (intermediate point of each line) is outward located and these mark display position both sides, course line on intermediate point place between the node.Processing can be avoided the user is got into a difficult position like this.At this moment, navigational system can judge whether shown the course line mark on the display screen according to the coordinate of course line mark and the body of a map or chart of demonstration.

In addition, if (for example middle body) do not show the course line mark in a certain preset range of display screen, then can increase the course line reference numerals of demonstration.In the foregoing description, the course line mark can append on the navigation course line of search.Yet the course line mark can append on the suggestion course line of storage in advance.

In the foregoing description, the course line mark can be affixed on the intermediate point and the intermediate point between these insertion points between each node and the insertion point.If yet the direction that makes the course line mark is pointed to next insertion point then is better.

In the foregoing description, can be to be in halted state according to vehicle, still travelling changes the demonstration of each course line mark.Show limited road when adopting vehicle to stop, and vehicle stops to show such method when travelling, if show the course line mark on limited road when vehicle travels, then show the limited road that does not show usually, also can display shape or the big or small course line mark that has changed.

In addition, in the above-described embodiments, kind, the quantity of course line mark and the shape and the size of each course line mark that can the rerouting mark.Yet, color that also can the rerouting mark.

In addition, in the above-described embodiments, the course line mark is each the intermediate point place that is presented at each line.For example, locate to show the course line mark at 2 that can be divided into trisection in one section course line.

In addition, in the above-described embodiments, also can adopt other course line marks (oval course line mark as shown in figure 30) to replace triangle course line mark with directivity with directivity with directivity.

Have characteristics in the mobile navigation system according to aforementioned each embodiment, promptly, during course line between showing at desired 2, can show the course line respectively with the distinct methods of wide territory map and detail map, in the mobile navigation system of each embodiment, because during the course line between showing at desired 2 is to show the course line with the distinct methods in wide territory map and the detail map, so under any engineer's scale, can make the course line of demonstration have good sharpness.

In addition, in mobile navigation system, because being distinct methods with the engineer's scale of displayed map, the course line shows, so under any engineer's scale, be easy to discern the course line.

In addition, in the mobile navigation system according to aforementioned each embodiment, because what show during detail map is big course line mark, and what show during the map of wide territory is little course line mark, so all can easily discern the course line under any engineer's scale.Judge for the user that simultaneously the difference between detail map and the wide territory map is easily and simple thing.

In addition, in mobile navigation system because detail map during with wide territory map the mutual interval of course line mark different, so under any engineer's scale, all can easily discern the course line.In addition, because needn't prepare two kinds of course line flag datas, so can reduce the shared capacity of data.

In addition, in the mobile navigation system of aforementioned each embodiment, can in showing, the course line not disappear because have the road that shows the course line, so the user can accurately discern the feature and the position of travel.

In addition, in mobile navigation system, because the shape of detail map and wide territory map Intermediate Course mark is mutually different, thus can under any engineer's scale, discern the course line easily, and easily produce the shape of each course line mark.

According to mobile navigation system of the present invention, as mentioned above, because the course line is to show according to the engineer's scale of map, so the user can easily discern or confirm the course line.The course line mark of also easily being discerned by the user corresponding to this engineer's scale can also be provided.In addition, can show the course line mark easily, simplify procedure for displaying.In addition, can appropriately set the interval between the mark of adjacent course line, make the user confirm that easily these at interval.

Claims

1. a mobile navigation system is characterized in that, comprises:

Map datum memory storage (1), be used for the storage respectively with a plurality of engineer's scale corresponding map data;

Setting device (14) is used to set a starting point and a destination;

Searcher (15) is used for search one course line between described starting point and described destination;

Map display (17,18,19,4) is used for showing the course line between described starting point and described destination on a map and this map;

Described map display represents that by control the course line in described course line is marked at the display mode on the described map, shows described course line according to the engineer's scale of described map.

2. mobile navigation system as claimed in claim 1, it is characterized in that, described map display shows first map according to the map datum corresponding to first engineer's scale, show second map according to map datum corresponding to second engineer's scale, on described first map or described second map, show the course line mark according to course data, and the course line flag settings that shows on described first map is become less than the course line mark on described second map.

3. mobile navigation system as claimed in claim 1, it is characterized in that, described map display demonstrates first map according to the map datum corresponding to described first engineer's scale, show second map according to map datum corresponding to second engineer's scale, on described first map or described second map, show the course line mark according to course data, and make the course line that shows on described first map be marked to be different from the course line mark that shows on described second map in shape.

4. mobile navigation system as claimed in claim 1, it is characterized in that, the map datum that described map datum memory device stores is made up of line and node, and the predetermined point place of described map display on first line that extends along the course-and-bearing of described course data representative shows a course line mark.

5. mobile navigation system as claimed in claim 4 is characterized in that, described map display has on the map on each line of predetermined length scope, shows a course line mark.

6. mobile navigation system as claimed in claim 1, it is characterized in that, described map display demonstrates first map according to the map datum corresponding to first engineer's scale, show second map according to map datum corresponding to second engineer's scale, on described first map and described second map, show the course line mark according to course data, and in described second map on each line in a certain course line, provide on it not line with the course line mark of demonstration.

7. mobile navigation system as claimed in claim 1 is characterized in that it also comprises the course line calculation element, is used for calculating the navigation course line that a certain vehicle is navigated.

8. mobile navigation system as claimed in claim 7, it is characterized in that, described course line calculation element reads the data of relevant each line on the navigation course line, described navigation course line is to be calculated by described course line calculation element according to the data of relevant each line, described data storage is in described map datum memory storage, and with described data storage in navigation course line storer, and data presentation one map that stores up with described navigation course line store memory of described map display.

9. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, and described map display becomes the course line flag settings on the navigation course line in the detail map less than the course line on the navigation course line in the map of wide territory to show note.

10. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, and described map display constitutes in the map of wide territory on the alternately line of each line in a certain course line and shows the course line mark.

11. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, and described map display is enclosed the course line mark respectively on line, each line has predetermined length or greater than a certain predetermined length, and described line is leniently to choose in each line on the navigation course line in the map of territory.

12. mobile navigation system as claimed in claim 11, it is characterized in that, described map datum memory device stores map datum, described map datum is made of the line data and the node data that comprise a course line marker for judgment sign indicating number, described map display is respectively applied for each line with the course line mark, each line data comprises that an active service judges sign indicating number with the course line mark, and described line leniently chooses in each line on the navigation course line in the map of territory.

13. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, described map display appends to the course line mark on the line respectively, each line has a certain predetermined length or greater than a certain predetermined length, described line is to choose in each line on the navigation course line from detail map and wide territory map.

14. mobile navigation system as claimed in claim 13, it is characterized in that, described map datum memory device stores is judged the line data of sign indicating number and the map datum that node data constitutes by including the course line mark, described map display appends to the course line mark on the line respectively, each line data comprises active service course line mark judgement sign indicating number, and described line is to choose in each line on the navigation course line from detail map and wide territory map.

15. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, on behalf of the course line mark of vehicle travel direction, described map display will append on each line in navigation course line in the detail map, the course line mark of not representing direction is attached on the line in navigation course line in the map of wide territory.

16. mobile navigation system as claimed in claim 8 is characterized in that, described map display will have on each line with the course line tag application of the shape of displayed map engineer's scale navigation course line in the map of drawing with each engineer's scale.

17. mobile navigation system as claimed in claim 8, it is characterized in that, described basis is a detail map corresponding to first map of the map datum of first engineer's scale, according to second map corresponding to the map datum of second engineer's scale is a wide territory map, map display appends to the course line mark on each line in navigation course line in the detail map, and shows each line on the navigation course line in the map of wide territory with some line segments respectively.